I downgraded to 2.1.20 ubiquity debs, and confirm that these do not have this problem. So it's apparently not a regression from the 2.1.20 conversion to plugins, but a regression in 2.1.21.
I downgraded to 2.1.20 ubiquity debs, and confirm that these do not have this problem. So it's apparently not a regression from the 2.1.20 conversion to plugins, but a regression in 2.1.21.